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Northeastern Section - 48th Annual Meeting (18–20 March 2013)

Paper No. 2
Presentation Time: 8:00 AM-12:00 PM

VARVE THICKNESS RECORDS FROM EASTERN NORTH AMERICA


RONAYNE, Leah1, PAQUETTE, Nathalie1, LAFONTAINE-BOYER, Karelle2 and GAJEWSKI, Konrad3, (1)Department of Geography, Laboratory for Paleoclimatology and Climatology, University of Ottawa, Ottawa, ON K1N 6N5, Canada, (2)Geography, University of Ottawa, Laboratory for pleoclimatology and climatology, Ottawa, ON K1N 6N5, Canada, (3)Geography, University of Ottawa, 60 University Pvt, Ottawa, ON K1N 6N5, Canada, lrona093@uottawa.ca

Lakes containing varved sediments are used in paleoecological studies because they provide accurate chronologies, more so than from sequences dated radiometrically. A series of lakes have been analyzed to investigate the late Holocene vegetation history of eastern North America at high temporal resolution and the varve thicknesses measured in order to compute pollen influx. In this study, we analyse the varve thickness records to determine scales of temporal variability in sediment deposition. Each series consists of the total varve thickness of 10-year intervals, and the series span the past 1000-2000 years. Seven Lakes, from North Eastern United-States and Eastern Canada (Conroy Lake and Basin Pond – Maine; Clear Pond – NY; Lac Noir and Lac Brulé – southern Quebec; Ely Lake - Pa; Hells Kitchen Lake - Wi) were available. Multi-decadal to century-scale variability is observed, but the results do not seem to be coherent between sites.

Session No. 38--Booth# 7

T2. Lakes as Sentinels for Climate Change: Monitoring and Sedimentary Records at the Junction of Paleo and Modern Limnology (Posters)
Tuesday, 19 March 2013: 8:00 AM-12:00 PM
Grand Ballroom South (Omni Mount Washington Resort)
Geological Society of America Abstracts with Programs. Vol. 45, No. 1, p.91
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